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acrn-config: walk secondary PCI Bus for target board

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There may be more than one PCI segment in target board, and DRHD info
should be parsed correctly base on secondary PCI bus. currently
board_parser.py tool did not handle such case.
Add this patch for walking secondary PCI Bus.

Tracked-On: #4143
Signed-off-by: Wei Liu <weix.w.liu@intel.com>
Acked-by: Victor Sun <victor.sun@intel.com>
This commit is contained in:
Wei Liu 2019-11-20 18:08:16 +08:00 committed by wenlingz
parent 5e9234203a
commit 40929efe4b
1 changed files with 56 additions and 0 deletions
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56
misc/acrn-config/target/dmar.py
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@ -3,7 +3,9 @@
# SPDX-License-Identifier: BSD-3-Clause
#
import sys
import ctypes
import parser_lib
ACPI_DMAR_TYPE = {
'ACPI_DMAR_TYPE_HARDWARE_UNIT':0,
@ -167,6 +169,7 @@ class DmarTbl:
# config from the other part of tools, so hard code the GPU_SBDF to gernerate DRHDx_IGNORE macro
CONFIG_GPU_SBDF = 0x10
PCI_BRIDGE_HEADER = 1
class PathDevFun:
"""Path Device Function meta data"""
@ -184,6 +187,56 @@ class PathDevFun:
self.path = 0
def get_secondary_bus(dmar_tbl, tmp_dev, tmp_fun):
cmd = "lspci -xxx"
secondary_bus_str = ''
found_pci_bdf = False
pci_bridge_header_type = False
res = parser_lib.cmd_execute(cmd)
while True:
line = res.stdout.readline().decode("ascii")
if not line:
break
if ':' not in line or len(line.strip().split(":")) < 1:
continue
if not found_pci_bdf:
if '.' not in line.strip():
continue
bus = int(line.strip().split(":")[0], 16)
dev = int(line.strip().split()[0].split(":")[1].split(".")[0], 16)
fun = int(line.strip().split()[0].split(":")[1].split(".")[1].strip(), 16)
if bus == dmar_tbl.dmar_dev_scope.bus and dev == tmp_dev and fun == tmp_fun:
found_pci_bdf = True
continue
else:
if "00:" == line.strip().split()[0]:
# PCI Header type stores in 0xE
if len(line.split()) >= 16 and int(line.strip().split()[15], 16) & 0x7 == PCI_BRIDGE_HEADER:
pci_bridge_header_type = True
continue
if not pci_bridge_header_type:
continue
# found the pci device, parse the secondary bus
if "10:" == line.strip().split()[0]:
# Secondary PCI BUS number stores in 0x18
secondary_bus_str = line.split()[9]
found_pci_bdf = False
pci_bridge_header_type = False
break
# the pci device has secondary bus
if secondary_bus_str:
dmar_tbl.dmar_dev_scope.bus = int(secondary_bus_str, 16)
def walk_pci_bus(tmp_pdf, dmar_tbl, dmar_hw_list, drhd_cnt):
"""Walk Pci bus
:param tmp_pdf: it is a class what contains path,device,function in dmar device scope region
@ -200,6 +253,9 @@ def walk_pci_bus(tmp_pdf, dmar_tbl, dmar_hw_list, drhd_cnt):
tmp_pdf.function = scope_path.function
tmp_pdf.path = (((tmp_pdf.device & 0x1F) << 3) | ((tmp_pdf.function & 0x7)))
# walk the secondary pci bus
get_secondary_bus(dmar_tbl, tmp_pdf.device, tmp_pdf.function)
if ((dmar_tbl.dmar_drhd.segment << 16) | (
dmar_tbl.dmar_dev_scope.bus << 8) | tmp_pdf.path) == CONFIG_GPU_SBDF:
dmar_hw_list.hw_ignore[drhd_cnt] = 'true'